Help in choosing between AMD R9 M375 4GB (Lenovo z51) and NVIDIA GeForce 920M 4GB (Dell 5558)?

Help in choosing between AMD R9 M375 4GB (Lenovo z51) and NVIDIA GeForce 920M 4GB (Dell 5558)?

Read more: Help in choosing between AMD R9 M375 4GB (Lenovo z51) and NVIDIA GeForce 920M 4GB (Dell 5558)?